These days with all the government hanging around having more than one gun can be a huge headache.I found a way around that I brought a glock 17.
After that I went on line and found a slide for a glock 22(or 31) on Ebay.
Then went on line and brought barrels for .40 caliber(glock 22) and .357sig caliber(glock 31). Finally I brought a mag for either caliber(interchangable) and what did I get three different guns all in one and for alot less money than buying them all separately and alot less hassles from the govt.

P.S. You can also buy a 22L conversion that will give you four calibers for about the price of two regular glocks. Any questions?

You might check with someome.
According to 2 Glock armorers, I know, when I was going to do the same thing w/a G 17, they said to do it the otherway around.
Get the .357 Sig (Lot higher pressure then the 9MM and some higher then the .40) and do the conversion that way if you are going to shoot a lot.
I did and it works real well.
PS. Still got a G17, also and it shoots and funtions outstanding.

(IMO) it would still be better to have the different glocks (calibers) than to rely on only one lower, if that breaks------SOL.
Interchangeability is nice depending on the situation, but since all fire from the same platform, you would not have to get used to a new pistol each time.

have a Model 23 in 40 cal, purchased a 357 sig barrel off ebay several years ago, it uses the same mags.

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I would have to agree with both Ammo and Kev82Abn. The 357 I believe is built a bit different to handle the higher pressures of the round. I'd also have two guns, both up to working standard in case one breaks.

These days with all the government hanging around having more than one gun can be a huge headache.I found a way around that I brought a glock 17.
After that I went on line and found a slide for a glock 22(or 31) on Ebay.
Then went on line and brought barrels for .40 caliber(glock 22) and .357sig caliber(glock 31). Finally I brought a mag for either caliber(interchangable) and what did I get three different guns all in one and for alot less money than buying them all separately and alot less hassles from the govt.

P.S. You can also buy a 22L conversion that will give you four calibers for about the price of two regular glocks. Any questions?

Hate to break it to ya, but that is not going to work on your Glock 17 frame. It may be functional but the frames of the 17 and the 22 are different. You will have a cracked frame in no time. The frames of the Glock 22 and Glock 31 have minor differences to handle the higher pressures.

Edit.. Also a .357 sig barrel will not work with a Glock 22 slide. I call BS on this post

Hate to break it to ya, but that is not going to work on your Glock 17 frame. It may be functional but the frames of the 17 and the 22 are different. You will have a cracked frame in no time. The frames of the Glock 22 and Glock 31 have minor differences to handle the higher pressures.

Edit.. Also a .357 sig barrel will not work with a Glock 22 slide. I call BS on this post

From what I know the larger 40 or 357 barrels will not fit in a 9mm slide, but does work the other way around. Same with the base of the round, a 9mm will fit in a slide made for a 40, but a 40 will not fit in a 9mm slide face.

As others have said, there is no need for all the different slides. Buy a G22 or G23 and then just buy the conversion barrels. I have the 40 to 9mm Lone Wolf conversion barrel and it works without a hitch. I do use G17 mags but we already had those as my wife prefers them in her G19. I have heard and read where people state the extractor on the G22 will not extract 9mm, that's a bunch of Crap, mine extracts and throws them with authority.